Table 1

Antibodies used in the study

Antigen	Clone	Antigen retrieval	P/M	Source
CD56 (NCAM)	NCC-Lu-243	Autoclave^*	M	Nippon Kayaku (Tokyo, Japan)
Chromogranin-A			P	DakoCytomation (Carpinteria, California, USA)
Synaptophysin			P	Signet Laboratories (Dedham, Massachusetts, USA)
TTF-1	8G7G3/1	Autoclave^*	M	DakoCytomation
p63	4A4	Autoclave^*	M	LAB Vision (Fremont, California, USA)
HMWK	34betaE12	Autoclave^*	M	DakoCytomation
N-cadherin		Autoclave^†	P	TaKaRa Bio (Shiga, Japan)
Ki-67	MIB-1	Autoclave^*	M	DakoCytomation

P/M, polyclonal antibody/monoclonal antibody; NCAM, neural cell adhesion molecule; HMWK, high molecular weight keratin.
↵* Autoclave in 0.1 mol/l citrate buffer pH 6.0.
↵† Autoclave in antigen retrieval solution (DakoCytomation).